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/* SPDX-License-Identifier: GPL-2.0-or-later */
Name(_HID, EISAID("PNP0A08")) /* PCIe */
Name(_CID, EISAID("PNP0A03")) /* PCI */
Device (MCHC)
{
Name (_ADR, 0x00000000) /*Dev0 Func0 */
OperationRegion (MCHP, PCI_Config, 0x00, 0x100)
Field (MCHP, DWordAcc, NoLock, Preserve)
{
Offset(0x60),
MCNF, 32, /* PCI MMCONF base */
Offset (0xA8),
TUUD, 64, /* Top of Upper Used Memory */
Offset(0xB4),
BGSM, 32, /* Base of Graphics Stolen Memory */
Offset(0xBC),
TLUD, 32, /* Top of Low Useable DRAM */
}
}
/* Current Resource Settings */
Method (_CRS, 0, Serialized)
{
Name (MCRS, ResourceTemplate()
{
/* Bus Numbers */
WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
0x0000, 0x0000, 0x00ff, 0x0000, 0x0100,,,)
/* IO Region 0 */
DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
0x0000, 0x0000, 0x0cf7, 0x0000, 0x0cf8,,,)
/* PCI Config Space */
Io (Decode16, 0x0cf8, 0x0cf8, 0x0001, 0x0008)
/* IO Region 1 */
DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
0x0000, 0x01000, 0xffff, 0x0000, 0xf000,,,)
/* VGA memory (0xa0000-0xbffff) */
DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
Cacheable, ReadWrite,
0x00000000, 0x000a0000, 0x000bffff, 0x00000000,
0x00020000,,,)
/* Data and GFX stolen memory */
DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
Cacheable, ReadWrite,
0x00000000, 0x3be00000, 0x3fffffff, 0x00000000,
0x04200000,,, STOM)
/*
* PCI MMIO Region (TOLUD - PCI extended base MMCONF)
* This assumes that MMCONF is placed after PCI config space,
* and that no resources are allocated after the MMCONF region.
* This works, sicne MMCONF is hardcoded to 0xe00000000.
*/
DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
NonCacheable, ReadWrite,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000,,, PM01)
/* PCI Memory Region (TOUUD - (TOUUD + ABOVE_4G_MMIO_SIZE)) */
QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
NonCacheable, ReadWrite,
0x00000000, 0x10000, 0x1ffff, 0x00000000,
0x10000,,, PM02)
})
/* Find PCI resource area in MCRS */
CreateDwordField (MCRS, PM01._MIN, PMIN)
CreateDwordField (MCRS, PM01._MAX, PMAX)
CreateDwordField (MCRS, PM01._LEN, PLEN)
/* Read C-Unit PCI CFG Reg. 0xBC for TOLUD (shadow from B-Unit) */
And(\_SB.PCI0.MCHC.TLUD, 0xFFF00000, PMIN)
/* Read MMCONF base */
And(\_SB.PCI0.MCHC.MCNF, 0xF0000000, PMAX)
/* Calculate PCI MMIO Length */
Add(Subtract(PMAX, PMIN), 1, PLEN)
/* Find GFX resource area in GCRS */
CreateDwordField(MCRS, STOM._MIN, GMIN)
CreateDwordField(MCRS, STOM._MAX, GMAX)
CreateDwordField(MCRS, STOM._LEN, GLEN)
/* Read BGSM */
And(\_SB.PCI0.MCHC.BGSM, 0xFFF00000, GMIN)
/* Read TOLUD */
And(\_SB.PCI0.MCHC.TLUD, 0xFFF00000, GMAX)
Decrement(GMAX)
Add(Subtract(GMAX, GMIN), 1, GLEN)
/* Patch PM02 range based on Memory Size */
If (LEqual (A4GS, 0)) {
CreateQwordField (MCRS, PM02._LEN, MSEN)
Store (0, MSEN)
} Else {
CreateQwordField (MCRS, PM02._MIN, MMIN)
CreateQwordField (MCRS, PM02._MAX, MMAX)
CreateQwordField (MCRS, PM02._LEN, MLEN)
/* Set 64bit MMIO resource base and length */
Store (A4GS, MLEN)
Store (A4GB, MMIN)
Subtract (Add (MMIN, MLEN), 1, MMAX)
}
Return (MCRS)
}
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